Valve for fountain stencil brush



Jan. 9, 1951 D. c. WRIGHT VALVE FOR FOUNTAIN STENCIL BRUSH Filed Jan. so, 1947 Patented Jan. 9, 1'951 UNITED STATES PATENT OFFICE 2,537,872 VALVE FOR FOUNTAIN STENCIL BRUSH Donald C. Wright, St. Petersburg, Fla. Application January 30, 1947 Serial N0. 725,388

2 Claims. l

This invention relates to fountain brushes used with stencil sheets for marking the names and addresses on packing cases.

It is an obj ectl of the present invention to provide a fountain brush with a iieXlble rubber diaphragm which is attached to the sliding valve to hold the valve in place and to positively prevent any leakage of ink beyond the diaphragm onto the operators hand.

It is another object of the present invention to provide a fountain brush with an operating handle which has a depression in its lower extremity the upper portion of which presents a hat straight guide ledge and a valve operating push button conforming generally on its exterior to the general contour of the operating handle and having a complementary flat straight upper edge adapted for sliding engagement with the guide ledge of the depression whereby to prevent the rotation of the valve stem connected to the operating push button and also the radial distortion of the diaphragm will be prevented.

It is another object of the present invention to provide a fountain brush with a diaphragm and with a two part stem adapted to be connected with the diaphragm between the two parts so as to be assured of a good sealing connection with the inner periphery of the diaphragm.

It is another object of the present invention to provide a fountain brush which has a pleasing shape, "simple in construction, inexpensive to manufacture and eiiicient in operation.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in connection with the accompanying drawing, in which Fig. 1 is a side elevational view of the fountain brush and looking upon the depression in the handle and upon the push button lying within the depression so that its top edge will lie parallel with the top ledge of the depression to keep the button from turning and as well as to keep the diaphragm from being distorted as a result of rotation.

Fig. 2 is an elevational cross-sectional View taken on line 2-2 of Fig. l and looking in the direction of the arrows thereof.

Fig. 3 is a transverse cross-sectional view taken through the valve and diaphragm assembly and on line 3 3 of Fig. 1 and looking in the direction of the arrows thereof.

Referring now to the gures, I represents an ink reservoir having an end cap II removably connected to the upper end thereof. The ink reservoir serves as a handle and has a base portion I2 from which ink from the interior of the ink reservoir decends by way of a passage I3 extending into and through a threaded projection III on the bottom end of the portion I2. The portion I2 has a `depression l5 with a top .straight flat guide ledge I6 for the straight flat upper edge I'I of a valve operating push button I8 having a two-part valve construction I9 connected to it by means of a screw 2l. The Valve construction I9 is contained in a transverse opening 22 extending inwardly from the depression I5. In the closed end of the opening there is a spring 23 tending at all times to return the valve I9 'to its closed position. The opening is enlarged as indicated at 2li and exteriorly of this enlarged section of the opening is a shoulder space 25 to which a diaphragm 26 is xed by means of a diaphragm retaining plate 2l and screws 28 entering the shoulder space 25 and the portion I2. The interior of the diaphragm 26 will enter the enlarged section 24 of the opening 22 as the press button I8 is pressed. The amount of movement will be limited by the engagement of the inner face of the diaphragm 26 with a rear face 29 of the enlarged section 24. The diaphragm is actually held between two parts I9 and I9 of the valve I9, The part I SVhas a threaded stem 3| extending through the center of the diaphragm 2E and forces by its shoulder 32 the diaphragm against the end face of the part I9 as the threaded stem I3 is coupled with the threaded opening in the part I9". The diaphragm thus has an operating connection with the valve parts and is moved with the valve parts both as the valve is moved inwardly and as the valve moves outwardly by the action of the spring 23. The diaphragm 26 is preferably of a synthetic rubber and acts only to provide a liquid seal.

The amount of movement permitted by the diaphragm 26 is such as to permit the location of an ink groove 34 within the passage to receive ink and to permit the iiow of the ink through the passage. At other times the passage I3 is closed.

Brstle tip 35 is contained in a ierrule 36 which contains at its upper end a back plate 3`I. This back plate 3'! has a central opening so that the back plate and the bristle tip can be tted over the threaded projection I4. The assembly is thereafter fixed to the portion I2 by a threaded insert 38 lying within the bristles and providing an opening 39 therein into which the ink is dispensed for distribution over the stencil by the bristle.

Having now described my invention, I claim:

1. In a valve means for controlling the flow of mk from a fountain brush the improvement com--` prising a two-part valve construction having a groove therein adapted to be aligned with an outlet passage in the brush as the valve construction is moved inwardly, the parts of the valve construction being separable and adapted to be tightened together, a diaphragm disposed between the valve parts and xed therebetween upon the valve parts being tightened together, a shoulder face in the brush forming an opening therein, a retaining plate and fastening elements for securing the diaphragm to the shoulder face about the opening, said retaining plate extending over the opening so as to limit through the diaphragm the outward movement of the valve construction, said opening having a shoulder face adapted to limit the forward movement of the valve construction, a spring in the opening and acting upon the valve and tending to return the valve to a closed position, and a press button on the end of the valve construction for effecting the inward movement of the valve to dispense inl; downwardly through the passage of the reservoir bottom portion, said press button having a fiat upper edge adapted to lie within a recess in the brush confronting the diaphragm and said recess having a flat upper edge, and a guide ledge on the bottom portion within the recess, and the flat upper edge of the recess adapted to slidably receive the :dat upper edge of the press button to prevent the rotation of the valve construction.

2. In a valve structure for a fountain brush having a lower portion with a passage extending downwardly therethrough, and said portion having a transversely extending opening across the passage, the improvement comprising a valve construction extending in the opening and having a groove adapted to be extended into the passage to receive ink and to permit the flow thereof through the passage, said lower portion having a depression in one side thereof aligned with the open end of the valve opening and having a ilat upper ledge, a press button connected to the valve construction and adapted to be worked in the depression within the lower portion and having a flat upper edge adapted to have sliding engagement with the guide ledge of the depression whereby the rotation of the valve construction is prevented, said valve opening having an enlarged section, a flexible diaphragm connected to the side of the enlarged opening section and to the valve construction and adapted to work within the enlarged opening section, said cooperating guide ledge of the depression and the flat edge of the button thereby also serving to prevent radial distortion of the diaphragm.

DONALD C. WRIGHT.

Name Date Moyes Nov. 1, 1887 Hodgkinson Jan. 3, 1911 Elzi Nov. 9, 1926A Number 

